Russia’s invasion of Ukraine has thrust America back into a main role on the world stage, complicating decades-old debates about the force wielded by the U.S.

The evidence of the past few days suggests that they are all deluding themselves.

The Trump administration has deprived Kyiv of one thing it desperately needs: predictable support.

In fact, it can’t afford not to.

If the U.S. president holds all the cards, why hasn’t he won any concessions from Russia?

A flock of sheep in Paris, demonstrations to mark International Women’s Day, an evacuated bear in Ukraine, skijoring in Colorado, a robot exhibition in Tokyo, and much more

The defense secretary is signaling a major shift.

Putin hasn’t given up his plans. He thinks Ukraine’s allies will lose interest.

Washington worries too much about what Putin thinks.

Ukraine’s president is rushing to the United States for good reason.